Past Perfect and Simple Past

1. Before I wenthad gone (go) to bed, I had readread (read) three chapters of the book.

2. When I had arrivedarrived (arrive) at the airport, my flight already departedhad already departed (already, depart).

3. By the time I arrivedhad arrived (arrive) at the party, everyone atehad eaten (eat) all the pizza.

4. They never visitedhad never visited (never visit) that museum before they had hadhad a school trip.

5. They had livedlived (live) in that house for ten years before they decidedhad decided (decide) to move.